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Quality detection and evaluation method for light color lignite wax

An evaluation method and montan wax technology, applied in the field of coal chemical industry analysis, can solve the problems of inability to digitally manage and evaluate colors, lagging behind the actual demand of production, and not rising to establishment.

Active Publication Date: 2015-08-05
KUNMING UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because these methods are relatively rough and lagging behind the actual production needs, they can neither carry out digital management and evaluation of colors, nor fundamentally scientifically explain their internal components, so they can no longer keep up with the pace of the times.
[0003] Although some relevant scientific researchers have also conducted some preliminary discussions on the chemical composition of montan wax, it has not risen to the level of establishing an objective and accurate method and comprehensive quality evaluation standard for controlling the quality stability of light-colored montan wax. , and in this way deeper explorations such as authenticity discrimination and origin attribution of light-colored montan wax are carried out, and this is crucial for a more in-depth grasp of the relevant properties of light-colored montan wax. The team of the inventors is committed to lignite It has been nearly 40 years of research on wax related technologies. It is very urgent and critical to understand the breakthrough and development of this surface, and hope that it can be applied to the actual industrial production and benefit the industry and society. Therefore, the content of the present invention is formed.

Method used

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  • Quality detection and evaluation method for light color lignite wax
  • Quality detection and evaluation method for light color lignite wax
  • Quality detection and evaluation method for light color lignite wax

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0205] Quality control of light-colored montan wax (Taking Eshan light-colored montan wax and deresinized montan wax as an example, other origins are similar):

[0206] The gas chromatography fingerprint detection method of this light-colored montan wax and deresinized montan wax, its concrete steps comprise as follows:

[0207] (1) Gas chromatographic fingerprints of light-colored montan wax and deresinized montan wax to be measured:

[0208] (1) Preparation of the reference solution: Accurately weigh the n-hexadecane GC analysis standard with a content ≥ 99% and add toluene to prepare a solution with a concentration of 0.4 mg / mL, which is the reference solution;

[0209] (2) Preparation of the test solution: Precisely weigh 5 mg of the same batch of Asan deresinized montan wax and its light-colored montan wax samples into two 5mL vials with caps, and accurately add 2mL of toluene and 500μL of the reference substance solution were then capped, heated in each capped vial unti...

Embodiment 2

[0218] Identification of adulteration of light-colored montan wax (taking Xundian light-colored montan wax as an example, other places of origin are similar):

[0219] The gas chromatography fingerprint detection method of this light-colored montan wax, its concrete steps comprise as follows:

[0220] (1) Establishment of gas chromatographic standard fingerprints:

[0221] (1) Preparation of the reference solution: Accurately weigh the n-hexadecane GC analysis standard with a content ≥ 99% and add toluene to prepare a solution with a concentration of 0.4 mg / mL, which is the reference solution;

[0222] (2) Preparation of the test solution: Accurately weigh 5 mg of powdered light-colored montan wax sample and put it into a 5 mL vial with a cap, add 2 mL of toluene and 500 μL of the reference solution accurately in turn, and then cover it, and heat until the light-colored montan wax is completely After dissolving, carry out derivatization reaction for 45 minutes, then adjust to...

Embodiment 3

[0231] Origin of light-colored montan wax (Take light-colored montan wax from Zhaotong and Xundian as examples, other origins are similar):

[0232] The gas chromatography fingerprint detection method of this light-colored montan wax, its concrete steps comprise as follows:

[0233] (1) Establishment of gas chromatographic standard fingerprints:

[0234] (1) Preparation of the reference solution: Accurately weigh the n-hexadecane GC analysis standard with a content ≥ 99% and add toluene to prepare a solution with a concentration of 0.4 mg / mL, which is the reference solution;

[0235] (2) Preparation of the test solution: Accurately weigh 5 mg of powdered light-colored montan wax sample and put it into a 5 mL vial with a cap, add 2 mL of toluene and 500 μL of the reference solution accurately in turn, and then cover it, and heat until the light-colored montan wax is completely After dissolving, carry out derivatization reaction for 45 minutes, then adjust to the original 2mL l...

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Abstract

The invention relates to a quality detection and evaluation method for light color lignite wax and belongs to the technical field of coal chemical industry analysis. Firstly, grading of appearance and color qualities of the light color lignite wax is performed, light color lignite wax sample images are collected under the condition of meeting ISO3664: 2000 standard by means of a digital / code camera that conforms to GB / T29298-2012, then at least ten representative detecting points are selected on images by a color picker tool of an image processing software, L, a and b values of each detecting point are obtained through software analysis, finally, fitted values of the L, a and b values of each detecting point are obtained to serve as three parameters that represent colors of the light color wax, and then gas chromatography fingerprint spectrum of the light color lignite wax is established so that quality controlling, adulteration identification and production place belonging are performed on to-be-detected light color lignite wax. By means of the quality detection and evaluation method for the light color lignite wax, the purpose of objectively, accurately, comprehensively and efficiently evaluating product qualities of the light color lignite wax can be achieved.

Description

technical field [0001] The invention relates to a quality detection and evaluation method of light-colored montan wax, belonging to the technical field of coal chemical analysis. Background technique [0002] Light-colored montan wax refers to the relatively light-colored montan wax product obtained from the crude montan wax extracted from young lignite after deresinization and oxidation refining. It is widely used in daily chemicals and medicines because of its irreplaceable excellent characteristics. , mechanical, electrical and other fields. The chemical composition of light-colored montan wax is relatively complex, which is greatly affected by the place of origin, year, and processing technology. For a long time, there has not been a relatively perfect methodological system for the quality evaluation of light-colored montan wax, especially the quality standard based on its internal composition characteristics. The traditional quality control method of light-colored mon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/27G01N30/02
Inventor 李宝才袁承角仕云张福水张惠芬张敉邓学琴
Owner KUNMING UNIV OF SCI & TECH
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